US2627480A

US2627480A - Yarn treating method

Info

Publication number: US2627480A
Application number: US48855A
Authority: US
Inventors: Edward J Heizer
Original assignee: Specialties Development Corp
Current assignee: Specialties Development Corp
Priority date: 1948-09-11
Filing date: 1948-09-11
Publication date: 1953-02-03
Anticipated expiration: 1970-02-03

Description

E. J. HEIZER YARN TREATING METHOD Feb. 3, 19,53

5 Sheets-Sheet 1 Filed Sept. ll, 1948 Feb. 3, 1953 E. J. HElzr-:R 2,627,480

YARN TREATING METHOD Filed Sept. 1l, 1948 3 Sheets-Sheet 2 Feb. 3, 1953 E. J. HEIZER YARN TREATING METHOD 3 Sheets-Sheet 3 Filed Sept. 11, 1948 IN V EN TOR.

Patented Feb. 3, 1953 YARN TREATING METHOD Edward J. Heizer, West Caldwell, N. J., assignor to Specialties Development Corporation, Belleville, N. J., a corporation of New Jersey Application September 11, 1948, Serial No. 48,855

6 Claims.

The present invention relates to treating yarn or the like, and more particularly to an improved method of treating yarn to increase the tensile strength and decrease the stretch thereof wherein the yarn is impregnated with a treating solution, is stretched and is then dried.

Accordingly, an object of the present invention is to provide a method of subjecting the yarn to operations which promote more complete impregnation of the yarn.

Another object is to provide such a method wherein the rate of impregnation is increased thereby enabling the yarn to be processed more rapidly.

Another object is to provide such a method wherein the fibers are loosened in the presence of a surplus amount of impregnant in a manner to enable entrapped air to diffuse outwards and the impregnant to pass into the yarn.

A further object is to provide a relatively simple, practical and economical method for accomplishing the foregoing.

Other and further objects of the invention will be obvious upon an understanding of the illustrative embodiment about to be described, or will be indicated in the appended claims, and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.

In accordance with the invention, these objects are accomplished by rolling the yarn axially while being advanced to alternately partially untwist and retwist the yarn to promote penetration of the impregna-nt, certain features of this treatment being that the yarn is first advanced through a bath of impregnant preferably containing a bonding agent, a surplus of impregnant is supplied while the yarn is subjected to the rolling action, the yarn is engaged and alternately pinched at spaced apart points between which points impregnant is supplied and the untwisting and retwisting action at the points may be synchronized with the lengthwise speed of the yarn. After the yarn has been impregnated, it preferably is stretched to effect elongation thereof and is dried while stretched to allow the bonding agent to harden and permanently set the fibers of the yarn in the manner they have been arranged by the foregoing treatment and thereby effect increase in tensile strength and decrease in stretch of the yarn.

The impregnant, for example, is of the type disclosed in United States Patent No. 2,220,958, and comprises a liquid containing a resinous bonding agent.

A preferred embodiment of the invention has been chosen for purposes of illustration and description, and is shown in the accompanying drawings, forming a part of the specification, wherein:

Figure 1 is a plan View, partly in section, illustrating apparatus which may be utilized to practice the impregnating steps of the method in accordance with the present invention.

Figure 2 is a sectional View taken along the line 2-2 on Figure 1. j

Figure 3 is an end View, `partly in section and partly in elevation.

Figure 4 is a schematic view, illustrating the action of the apparatus during impregnation of the yarn.

Figure 5 is a schematic View of apparatus, diagrammatically illustrating a method of treating yarn wherein the impregnating steps are utilized.

Referring to the drawings in detail, there is shown in Figure 5 thereof apparatus for performing the method in accordance with the present invention which will serve to illustrate the method in which the yarn is treated. One or more strands of yarn Y are pulled or delivered from a source of supply (not shown) and are passed through a bath of impregnant in a receptacle i6 around a power driven roll I4 and between a pair of endwise reciprocated idler rolls I5 in rolling contact with the roll I4 for effecting working and impregnation of the yarn as described hereinafter.

The impregnated yarn is passed through a pair of power driven squeeze rolls I which are operated at a slightly lower surface speed than the roll I4 to enable the impregnated yarn to relax and absorb the impregnant applied thereto. The yarn is then passed through a :pair of power driven pull rolls 2 which are operated at a sufciently higher surface speed than the rolls I to stretch the yarn, tension the same to almost its breaking point, and thereby effect elongation thereof.

The tensioned yarn is next passed through a drying chamber, such as an oven 4 or the like, wherein the liquid in the impregnant is removed by evaporation to enable the bonding agent to be caused or allowed to harden to permanently set the individual fibers of which the yarn is composed.

The yarn is advanced through' and removed from the oven by a second pair of full rolls 5 operated at a surface speed suiiiciently higher than that of the rolls 2 to maintain the yarn in stretched condition while passing through the oven and take up any stretch of the yarn occa-- sioned by the drying thereof to thereby retain the yarn in its elongated condition.

Thereafter, the yarn is delivered to a Winder 6 for packaging the same.

By reason of the impregnating step employed herein as about to be described, the fibers of the yarn areV setV in suchl amanner by the operations subsequent to impregnation that the tensile strength and stretch characteristics of the yarn are greatly improved.

Referring more particularly to Figures 1 to 3, there is shown apparatus for accomplishing the impregnation and working of the yarn which comprises a base IG and a pair of upright side frames II on the base for rotatably mounting a drive shaft I2 adapted to be driven by a suitable source of power (not shown). The roll is is keyed on the shaft I2 for rotation therewith, and the idler rolls I5, which have a soft covering I3 thereon, are supported above the roll Iii in rolling contact therewith by means about to be described and in a manner whereby yarn Y is adapted to be fed between the roll I4 and the rolls I5 as shown in Figure 2. The receptacle IE5, which contains impregnant, is supported by the side frame Ii ina positionl whereby the underside of the roll I4 is adapted to pass the yarn through the impregnant before the yarn passes between the rolls (Figure 5).

Each of the rolls I5 is supported by a shaft I'I andk each shaft has its respective ends supported by means of a spherical bearing I9 on levers 20 and 2l, respectively, constructed and arranged tosupport the shafts i'i in parallel relation with respect to each other and to the drive shaft I2. The levers 2i! and ZI each are pivotally mounted for oscillation on the side frames by a pin 22 or the like extending therethrough (Figures 1 and 3).

The lever 2i). has an extension arm 2Q (Figure 1) suitably connected to one end of a rocker arm r lever 25 pivotally mounted on the frame I I at 26 which hasa cam follower 27 at its other end positioned in the groove 29 of a rotatable cam drum 39 on a shaft 3l mounted parallel to the drive, shaft I2 between one of the side frames I i and an upright bearing support 32 (Figure 3). Rotation of the cam drum is effected by a gear 3d on the drive shaft meshing with a gear 35 on the cam shaft 3|. The cam drum effects rocking of the arm 25 which in turn oscillates the lever 29 and the lever ZI through the shafts II, whereby the rolls I are moved back and forth endwise inV anV arcuate path.

InY operation,V as the rolls I5 move endwise in an arcuatepath, they increase and decrease the pressure thereof on the roll Ia at the nips (Figure. 4). At the end of the stroke, with the least endwise motion, the nips are the tightest, while at mid-stroke, with rapid endwise motion, the nipsare the lo-osest. The yarn is fed between the nips in a lengthwise direction and is rotated or rolled in one direction when pinched at one of the nips due to increased pressure and is rotated or rolled. in thev other direction when pinched at the other of the nips. This tends to equalize the action. on the yarn to give substantially uniform penetration of the impregnants throughout the length of the yarn.

While the arcuate motion is highly advantageous, equally successful results may be attained by reciprocating the pair of rolls I5 endwise in a straight line. motion at a high frequency. By moving the, rolls I5 back. and forth endwise ata 4 relatively rapid rate with respect to the lengthwise movement of the yarn, the yarn is alternately twisted and untwisted repeatedly as it is fed through the rolls.

Twisting of the yarn makes it more compact, while untwisting loosens the fibers, so that the above action causes the yarn to breathe This breathing action causes the entrapped air to be diffused outwards and the impregnant carried from the receptacle I 6 b-y the roll I4 to penetrate into the loosened fibers. Impregnation further is improved by enabling a surplus of impregnant to be carried between the nips when loose and be supported on the upper surface of the roll I4 at 4B (Figure 2) between the pair of rolls I5. The surplus of irnpregnant provides for maximum absorption thereof by the yarn. Due to the efficient impregnation of the yarn, the yarn can be fedl through the machine at relatively high speed.

The frequency of the endwise motion may be synchronized with the speed of the yarn in a lengthwise direction, whereby a point in the yarn untwisted between one of the nips will be twisted at the other nip, and vice versa.

In view of the foregoing description, it will be seen that the present invention provides an improved method of impregnating yarn more rapidly and effectively in a simple and practical manner.

As various changes may be made, without departing from the spirit and scope of the invention and without sacrificing any of its advantages, it is to be understood that all matter herein is to be interpreted as illustrative `and not in any limiting sense.

It is also to be understood that the following claims are intended to cover all the generic and specific features of the invention herein described and all statements of the scope of the invention which, as a matter of language, might be said to fall therebetween.

This application is a continuation-impart of my application Serial No. 31,903, filed June 9, 1948, which has been abandoned and was a division of my co-pending application Serial No. 755,165, filed June 17, 1947, now United States Patent No. 2,476,298, dated July 19, 1949.

I claim:

1. The method of treating strands of yarn in twisted condition which comprises engagingy the yarn `at spaced apart points while moving the yarn in a lengthwise axial direction, supplying a surplus of liquid impregnant to the yarn between the points of engagement, periodically pinching the yarn at the points of engagement, and rolling the section of the yarn held between the points of engagement back and forth transversely to the axis of movement thereof to enable the impregnant to more completely penetrate the yarn.

2. The method of treating strands of yarn in twisted condition which comprises engaging the yarn at spaced apart points while moving the yarn in a lengthwise axial direction, supplying liquid impregnant to the yarn between the points of engagement, and periodically pinching the yarn at the points of engagement and rolling the yarn back and forth transversely t0 the axis of movement thereof to eiect alternate untwisting and twisting the yarn at one point of engagement while simultaneousiy alternately twisting .and untwisting the yarn at the other point of engagement and applying rolling movement to the section of the yarn between the points ofk engagement whereby the fibers of the yarn, are

loosened to enable the impregnant to more completely penetrate the yarn.

3. The method of treating strands of yarn in twisted condition which comprises engaging the yarn at spaced apart points while moving the yarn at a predetermined speed in a lengthwise axial direction, supplying liquid impregnant to the yarn between the points of engagement, and periodically pinching the yarn at the points of engagement and rolling the yarn back and forth transversely to the axis of movement thereof to effect alternate untwisting and twisting the yarn at one point of engagement while simultaneously alternately twisting and untwisting the yarn at the other point of engagement and applying rolling movement to the section of the yarn between the points of engagement whereby the fibers of the yarn are loosened to enable the impregnant to more completely penetrate the yarn, the frequency of the twisting and untwisting action being synchronized with the speed of the yarn in a lengthwise direction whereby a point in the yarn untwisted at one of the points of engagement will be twisted at the other point of engagement.

4. The method of treating strands of yarn in twisted condition -which comprises advancing the yarn in a lengthwise axial direction through a bath of liquid impregnant, engaging and periodically pinching the yarn at a pair of spaced apart points while advancing the yarn, rolling the section of the yarn held between the pinched points back and forth transversely to the axis of movement thereof to alternately partially untwist and retwist the yarn to promote penetration of the impregnant into the yarn, and supplying a surplus of impregnant to the yarn between the points of engagement.

5. The method of treating strands of yarn in twisted condition to increase the tensile strength and decrease the stretch thereof comprising advancing the yarn in a lengthwise axial direction through a bath of liquid impregnant containing a bonding agent, engaging the advancing yarn at a pair of spaced apart points and periodically pinching the yarn at the points of engagement,

rolling the section of the yarn held between pinched points back and forth transversely to the axis of movement thereof to alternately untwist and retwist the yarn to promote penetration of the impregnant into the yarn, supplyingv a surplus of impregnant between the points of engagement, stretching the impregnated yarn to elongate the same, :and drying the yarn while stretched to allow the bonding agent to harden and permanently set the fibers of the yarn.

6. The method of treating yarn which comprises ladvancing the yarn in a lengthwise axial direction through a bath of liquid impregnant, engaging the yarn at spaced apart points and rolling the section of the yarn held between points of engagement back and forth transversely to the axis of movement thereof to alternately parti-ally untwist and retwist the yarn, and supporting the yarn between the points of engagement while supplying liquid impregnant to the yarn from the bath.

EDWARD J. HEIZER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 606,869 Macbrair July 5, 1898 1,197,396 Price Sept. 5, 1916 1,492,316 Wardwell Apr. 29, 1924 1,745,285 Whiffen Jan. 28, 1930 1,877,488 Allen Sept. 13, 1932 2,040,105 Ritzert May 12, 1936 2,055,776 ySaladino Sept. 29, 1936 2,162,551 Hawley, Jr. June 13, 1939 2,220,958 Jennings Nov. 12, 1940 2,381,398 Bosomworth Aug. 7, 1945 2,398,516 Burgeni et al. Apr.. 16, 1946 FOREIGN PATENTS Number Country Date 531,910 Germany Aug. 6, 1931 505,229 Great Britain May 8, 1939

Claims

5. THE METHOD OF TREATING STRANDS OF YARN IN TWISTED CONDITION TO INCREASE THE TENSILE STRENGTH AND DECREASE THE STRETCH THEREOF COMPRISING ADVANCING THE YARN IN A LENGTHWISE AXIAL DIRECTION THROUGH A BATH OF LIQUID IMPREGNANT CONTAINING A BONDING AGENT, ENGAGING THE ADVANCING YARN AT A PAIR OF SPACED APART POINTS AND PERIODICALLY PINCHING THE YARN AT THE POINTS OF ENGAGEMENT, ROLLING THE SECTION OF THE YARN HELD BETWEEN PINCHED POINTS BACK AND FORTH TRANSVERSELY TO THE AXIS OF MOVEMENT THEREOF TO ALTERNATELY UNTWIST AND RETWIST THE YARN TO PROMOTE PENETRATION OF THE IMPREGNANT INTO THE YARN, SUPPLYING A SURPLUS OF IMPREGNANT BETWEEN THE POINTS OF ENGAGEMENT, STRETCHING THE IMPREGNATED YARN TO ELONGATE THE SAME, AND DRYING THE YARN WHILE STRETCHED TO ALLOW THE BONDING AGENT TO HARDEN AND PERMANENTLY SET THE FIBERS OF THE YARN.